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F150 backing lights not working Sign up here! Search this forum this category all forums for All words Any words Whole Phrase (search options) Auto Repair Home>> Automotive Repair>> Automotive Wiring and Electrical hesterj New User Jun 21, 2016, 4:19 PM Post #1 of 4 (1433 views) F150 backing lights not working Sign In 2004 F150 4x4 backing lights do not come on when reversing. I have checked fuses, bulbs and replaced the DTR sensor, there is definitely power to the DTR but no power getting through to the lights, have aligned DTR per instructions to neutral line etc. Not sure what else to try? Hammer Time Ultimate Carjunky / Moderator Jun 21, 2016, 4:27 PM Post #2 of 4 (1425 views) Re: F150 backing lights not working Sign In If you have power coming into the circuit but the switch is not sending it back out, that is obviously a bad switch but after it comes out of the range sensor, it triggers a relay that forwards a different power source to the lights. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional. hesterj New User Jun 21, 2016, 4:39 PM Post #3 of 4 (1420 views) Re: F150 backing lights not working Sign In thanks, As I just purchased a new DTR switch I'm assuming it's good. How do I check if it's not? Is there a way to check the relay. Sorry I'm not used to electrical diagrams so a little hard to follow. Hammer Time Ultimate Carjunky / Moderator Jun 21, 2016, 4:45 PM Post #4 of 4 (1416 views) Re: F150 backing lights not working Sign In You're going to need a test light or DVOM to test the circuit. If this is not your thing, then you probably need to pay someone else to do it. Someone has to follow that diagram and systematically find out where the power is being lost. You can at least test both fuses in the diagram. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.   Automotive Repair     Auto Body Repair and Refinishing     Heating or AC Issues     Electrical and Wiring     Brake Systems     Car Stereo Repair Advice     General Discussions     Car Making Funny Noises     Engine Fault Codes     Engine Troubles     Exhaust Systems     Steering and Suspension     Transmission Troubles     Tricks of the Trade Automotive World     General Discussions     Antique Car Talk     Car Shows and Events     The Bargin Bin     Motor Vehicle Inspection     Car Care Tips     Traffic Tickets     Gasoline, Motor Oils, Concept Cars and Engines     Auto Insurance, Financing, Leases, Warranties Truck Repair     General Discussions     Truck Engine Repair     Truck Suspension Repair Motorcycle Repair     General Discussions     Motorcycle Engine Repair CarJunky     Open Posting     Board FAQ's     New Board Suggestions

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